Bookmarks
KEY FACTS
Terminology
Imaging Findings
TERMINOLOGY
Definitions
- Aneurysm
- An artery is considered aneurysmal when its diameter equals or exceeds 1.5 times the normal diameter (outer wall to outer wall)
- True aneurysm
- Composite layers of the vessel wall are intact but stretched
- Majority of aortic and iliac aneurysms are true aneurysms
- False aneurysm
- Occurs when a hole in the arterial wall permits escape of blood which is subsequently confined by surrounding tissue
- Mycotic aneurysm
- Refers to infection related aneurysms
- Arterial dissection
- Occurs when blood enters the media through a defect (entry site) in the intima and dissects along the length of the artery
- Intima may be stripped away in some parts and a new lumen (false lumen) may be formed
- Blood may flow freely through both the true and false lumens
- False lumen may compress the true lumen
- False lumen may end up supplying branch vessels and the branch vessels may occlude when the false lumen occludes
- Most aortic dissections originate from the thoracic aorta although localized abdominal dissection has been reported
- Aneurysm neck
- When applied to infrarenal aortic aneurysm refers to the distance between the more inferior of the renal arteries and the origin of the aneurysm
- Aneurysm
IMAGING FINDINGS
General Features
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Image Interpretation Pearls
Selected References
- EVAR trial participants. Related Articles et al: Endovascular aneurysm repair versus open repair in patients with abdominal aortic aneurysm (EVAR trial 1): randomised controlled trial. Lancet. 365(9478):2179-86, 2005
- Zwiebel WJ et al: Introduction to Vascular Sonography, 5th ed. Philadelphia, Elsevier Saunders. 529-69, 2005
- Greenhalgh RM et al: Comparison of endovascular aneurysm repair with open repair in patients with abdominal aortic aneurysm (EVAR trial 1), 30-day operative mortality results: randomised controlled trial. Lancet. 364(9437):843-8, 2004
Related Anatomy
Loading...
Related Differential Diagnoses
Loading...
References
Tables
Tables
KEY FACTS
Terminology
Imaging Findings
TERMINOLOGY
Definitions
- Aneurysm
- An artery is considered aneurysmal when its diameter equals or exceeds 1.5 times the normal diameter (outer wall to outer wall)
- True aneurysm
- Composite layers of the vessel wall are intact but stretched
- Majority of aortic and iliac aneurysms are true aneurysms
- False aneurysm
- Occurs when a hole in the arterial wall permits escape of blood which is subsequently confined by surrounding tissue
- Mycotic aneurysm
- Refers to infection related aneurysms
- Arterial dissection
- Occurs when blood enters the media through a defect (entry site) in the intima and dissects along the length of the artery
- Intima may be stripped away in some parts and a new lumen (false lumen) may be formed
- Blood may flow freely through both the true and false lumens
- False lumen may compress the true lumen
- False lumen may end up supplying branch vessels and the branch vessels may occlude when the false lumen occludes
- Most aortic dissections originate from the thoracic aorta although localized abdominal dissection has been reported
- Aneurysm neck
- When applied to infrarenal aortic aneurysm refers to the distance between the more inferior of the renal arteries and the origin of the aneurysm
- Aneurysm
IMAGING FINDINGS
General Features
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Image Interpretation Pearls
Selected References
- EVAR trial participants. Related Articles et al: Endovascular aneurysm repair versus open repair in patients with abdominal aortic aneurysm (EVAR trial 1): randomised controlled trial. Lancet. 365(9478):2179-86, 2005
- Zwiebel WJ et al: Introduction to Vascular Sonography, 5th ed. Philadelphia, Elsevier Saunders. 529-69, 2005
- Greenhalgh RM et al: Comparison of endovascular aneurysm repair with open repair in patients with abdominal aortic aneurysm (EVAR trial 1), 30-day operative mortality results: randomised controlled trial. Lancet. 364(9437):843-8, 2004
